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US 4,067,869 AGranted
3-Amino-2-aza benzoquinone diimines
AssigneeL'oreal
InventorsGregoire Kalopissis, Andree Bugaut, Francoise Estradier
Life of this patent
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Abstract
A process for producing indamine by condensing 2,6-diamino pyridine on a paraphenylene diamine or a benzoquinone diimine or a paranitroso N,N-dialkyl aniline. The resulting indamine can be incorporated into a dye composition for keratinic fibers, especially human hair.
Claims5
An indamine selected from the group consisting of
- a. an indamine having the formula ##STR7## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently are selected from the group consisting of hydrogen, halogen, lower alkyl having 1-4 carbon atoms and lower alkoxy having 1-4 carbon atoms, and R.sub.5 and R.sub.6 are selected from the group consisting of hydrogen, lower alkyl having 1-4 carbon atoms and lower alkyl having 1-4 carbon atoms and substituted with a member selected from the group consisting of acetylamino and carbamyl with at least one of R.sub.5 and R.sub.6 being said lower alkyl substituted with acetylamino or carbamyl,
- b. a human hair compatible water soluble acid salt of said indamine in (a), and
- c. a double chloride of zinc and said indamine in (a).
Dependencies are inferred from the claim text.